Pateot of



M. H. THOMS.

VALVE.

APPLICATION FILED APR. 611916.

LQSSS@ PatentedAug. 8,1916.

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lungh if ff 'oniTnn sTaTTs TaTnuT cierren@ MAX H. THOMS, 0FINDIANAPOLIS, INDIANA, ASSIGNOR TO HOWARD MARMON.

VALVE.

lineages.

Specification of Letters Patent.

Patented Aug. 8, 1916.,

Application filed April 6, 1916. Serial No. 89,448.

are interlocked without any additional parts,

by the mere pressure of the spring, and the washer can nevertheless bereadily removed and replaced.

rlhe accompanying drawing illustrates my invention.

Figure 1 is a longitudinal central section through a valve stem and itswasher, its spring, and its mounting, showin-g my imroved construction'Fig. 2 is a ers ective view of the washer and the upper end ot the valvestem interlocked; Fig. 3 is a view similar to Fig. 2, showing the upperend of the valve stem and the washer at an intermediate point in theprocess of being put together or separated; and Fig. 4l is a centralsection through the washer.

The valve 10 cooperates in the usual manner with the seat 11 and has astem 12 which is slidably mounted in a bushing 13 suitably vsupported inthe cylinder head 14,

which is shown as having the usual watercirculating passages, but may beof any suitable form. rThe bushing 13 is provided with a collar 15 forholding it in place. pressed sheet metal washer 16 fits against theouter face of this shoulder and against the outer surface of thecylinder head, as clear from Fig. 1, and one or more compression springs17 and 18 act between this pressed sheet metal washer and a washer 19mounted on the projecting end of the valve stem 12.

'The upper part of the valve stem 12 has an end portion 20 of largerdiameter, a portion 21 of smaller diameter, and a tapered portion 22joining the portions 20 and 21. The portion 20 is conveniently of thesame diameter as the main body of the valve stem 12, so that the portion21 is of smaller diameter than the body of the valve stem. Thelength ofthe portion 21 is substantially equal to the maximum thickness of thewasher 19, and the combined lengths of the -portions- 2O and 22 are alSOabout equal to or slightly greater than such maximum thickness.

The washer 19 has a central hole 25 which has an upper portion 26 ofproper diameter to fit the portion 20 'of the valve stem anda lowerportion 27 which is tapered to fit the tapered portion 22 of the valvestem, so that the hole 25 as'a whole is too small to allow the passagetherethrough of the portion 20, but fits the portions 20 and 22 so thatwhen such valve stem portions are seated in the portions 26 and 27 ofthe hole 25 the washer is iirmly positioned. rlhe washer 19 also has asecond hole 28 which is laterally displaced from the center of thewasher and is larger in diameter throughout than is the portion 20 ofthe valve stem. In consequence, such portion 20 can pass freely throughthe hole 28. rEhe holes 25 and 28 overlap, Jforming between them acontracted neck 29 which is of greater width than the diameter of theportion 21 of the valve stem. In Consequence, when the washer 19 ispushed down intolthe place of the portion 21 of the valve stem, suchportion can be passed through this neck 29 to bring the valve stem intoeither the hole 25 or the hole 28. `When in the hole 28, the washer maybe removed from or placed on the valve stem, but when in the hole 25 itis held rinly against removal. When assembled in this latter position,the action of the springs 17 and 18 on the washer 19 holds the valvestem portions 2O and 22 firmly seated in the hole portions 26 and 27 ofthe hole 25 in the washer 19. Thus to put the washer 19 in place on thevalve stem, it is merely necessary to Jforce it downward against thepressure of the springs 17 and 18 with the valve stem in line with thehole 28, until the valve stem is brought to the plane ot' the portion21, whereupon by a lateral movement of the washer such portion is passedthrough the neck 29" and the valve stem brought into alinement with thehole 25. Upon now releasing the washer 19, the springs 17 and 18 forceit outward to seat the upper end of the valve stem iirmly in the hole25. rllhe washer 19 may be removed by the reverse of this operation.

I claim as my invention:

1. A one piece valve and valve stem, the end part of the valve stemopposite the valve having an end portion of larger diameter, a portionof smaller diameter removed lfrom such end portion, and a tapered por`tion joining said larger and smaller portions, in combination withaspring-retaining washer having a hole portions of which t said largerand tapering portions respectively oi" said valve stem, and a secondhole of suhicient size throughout 'to allow the passageof said largerportion, said two holes beinof joined by a contracted passageway ofsuilicient size to allow the passage of said smaller stem portion fromone hole to the other, and a spring tending to force said washer alongsaid valve stem away from said valve.

2. A valve and valve stem, theend part of the valve stein opposite thevalve having an end portion of largerldiameter, a portion of smallerdiameter removed from such end' portion, and a tapered portion joiningsaid larger and smaller portions, in combination with a spring-retainingwasher having a hole portions of which fit said larger and taperingportions respectively of said valve stem, and 'a second hole ofsufficient size throughout to allow the passage of said larger portion,said two holes being joined by a contracted passageway of suliicientsize to allow the passage of said smaller stem portion from one hole tothe other, and a spring vtending to force said washer along said valvestem away from said valve.

3. A one piece valve and valve stem, the end part of the valve stemopposite the valve having an end portion of larger diameter and aportion of smaller diameter removed from such end portion, in combina;tion with a spring-retaining washer having a hole one portion of whichfits said larger portion of the valve stem and another portion of whichis smaller than said larger portion so that the larger portion in itsentirety cannot pass through vsuch hole of said Valve stem, and a secondhole of suiiicient size throughout to allow the passage of said largerportion, said two holes being joined by a contracted passageway ofsuiiicient size to allow the passage of washer along said valve stemaway from said valve.

4l. A valve and valve stem, the end part of the valve stem opposite thevalve having an end portion of larger diameter and a portion of smallerdiameter removed from such end portion, in combination with aspringretaining washer having a hole one portion of which fits saidlarger portion of the valve stem and another portion of which is smallerthan said larger portion so that the larger portion in its entiretycannot pass through such hole of said valve stem, and a second hole ofsuiiicient size throughout to allow the passage of said larger portion,said two holes being joined by a contracted passageway of sulicient sizeto allow the passage of said smaller stem portion from one hole totheother, and a spring tending to force said washer along said valvestem away from said valve. j

5. A one piece valve and Valve stem, the end part of the valve stemopposite the valve being provided with a head which is larger than aportion of the valve stem between it and the valve, in combination withaspring-retaining washer having two holes one of which is large enough toallow thepassage of said head and the other of which is too small toallow the passage of said head, the two holes being connected by anarrow neck sufficiently large to permit the passage therethrough fromone hole to the other of the valve stem portion which is smaller thansaid head.

6. A valveoand valve stem, the end part of the valve stem opposite thevalve being provided with a head which is larger than a portion of thevalve stem'between it and the valve, in combination with a spring-retaining washer having two holes one of which is large enough to allow thepassage of said head and the other of which is too small to allow thepassage of said head, the two holes being connected by a narrow necksutliciently large to permit the passage therethrough from one hole tothe other of the valve stem portion which is smaller than said head.

ln witness whereof, I have hereunto set my handat Indianapolis, Indiana,this 3d day of April, A. D. one thousand nine hundredy and sixteen.

MAX H. THOMS.

Witnesses R. M. MUELLER, L. E. DINKINs.

